Originally Posted by jtlee1
Anyone ever try using those on a cold night? You wouldn't have the issue of leaks that you might with a hot water bottle, but are they as effective?
I have and they are not nearly as warm as the hot water bottle trick. They do work good for warming up your frozen boots in the morning! After your warm boots are on, you can rubber band them to the back of your GPS or other electronic devices (SteriPen) to keep the batteries warm and happy and ensure many hours of cold weather use.